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Study of electron cyclotron resonance heating in over-dense plasmas with direct oblique launching from the high field side

Research Project

Project/Area Number 18K03590
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 14020:Nuclear fusion-related
Research InstitutionNational Institute for Fusion Science

Principal Investigator

Hiroe Igami  核融合科学研究所, ヘリカル研究部, 准教授 (10390634)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords電子サイクロトロン共鳴加熱 / 高密度プラズマ加熱 / プラズマ波動相互作用 / プラズマ境界領域 / 電子サイクロトロン加熱 / 異常波 / 周辺プラズマ加熱 / 強磁場ECH / 電子バーンシュタイン波
Outline of Final Research Achievements

For electron cyclotron resonance heating (ECRH) with the fundamental electron cyclotron wave, the ordinary (O-) mode is usually launched from the lower magnetic field side in magnetically confined plasmas. In this study, the extraordinary (X-) mode was launched from the high magnetic field side not to encounter the X-mode cutoff that appears in the low density region in the low magnetic side. And we experimentally demonstrated the plasma initiation and ECRH in the region where the plasma electron density exceeds the O-mode cutoff by high field launching of the fundamental X-mode.

Academic Significance and Societal Importance of the Research Achievements

磁場閉じ込め形式の核融合装置における炉心プラズマにおいて、電子サイクロトロン波による共鳴加熱(ECRH)は、炉心プラズマの生成・保持・電流駆動に大きな役割を果たすと期待される。通常ECRHには基本あるいは第二高調サイクロトロン共鳴周波数が用いられ、第二高調波の方が高密度領域まで伝播可能であるが、磁場強度の大きい核融合プラズマでは第二高調波帯の大電力/定常発振管の開発が困難となる可能性がある。本研究により、基本波の正常波遮断密度を超えるプラズマのECRHが可能なことが実験的に実証され、核融合炉心プラズマの加熱可能密度領域の拡張が可能であることが示された。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (14 results)

All 2022 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (11 results) (of which Int'l Joint Research: 7 results,  Invited: 1 results)

  • [Journal Article] Development of the Molybdenum Millimeter Wave Target Tile for ECRH Antenna Alignment after the Evacuation in LHD2021

    • Author(s)
      Hiroe IGAMI, Ryoma YANAI, Satoshi ITO, Yasuo YOSHIMURA, Shin KUBO, Hiromi TAKAHASHI, Takashi SHIMOZUMA, Toru Ii TSUJIMURA1, Masaki NISHIURA and Yoshinori MIZUNO
    • Journal Title

      Plasma and Fusion Research

      Volume: 16 Pages: 245066-245066

    • NAID

      130008053127

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recent ECRH/ECCD experiments aiming for higher density and temperature operations in the LHD2019

    • Author(s)
      Igami Hiroe、Kubo Shin、Shimozuma Takashi、Yoshimura Yasuo、Ii Tsujimura Toru、et al.
    • Journal Title

      EPJ Web of Conferences

      Volume: 203 Pages: 02001-02001

    • DOI

      10.1051/epjconf/201920302001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Development of a Quick-Response Microwave Bolometer for the Stray Radiation Measurement in LHD2018

    • Author(s)
      Igami Hiroe、Kubo Shin、Shimozuma Takashi、Yoshimura Yasuo、Takahashi Hiromi、Tsujimura Toru Ii
    • Journal Title

      2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018)

      Volume: CFP18IMM-POD Pages: 1224-1225

    • DOI

      10.1109/irmmw-thz.2018.8510348

    • Related Report
      2018 Research-status Report
  • [Presentation] Evaluation of the O-X mode conversion rate of the finite width wave in two dimensional systems2022

    • Author(s)
      H. Igami, A. Fukuyama, K. Nagasaki
    • Organizer
      21st Joint Workshop on Electron Cyclotron Emission (ECE) and Electron Cyclotron Resonance Heating (ECRH)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electron Bernstein wave Emission Measurement in Ka-band for high b discharges in LHD2021

    • Author(s)
      H. Igami, K. Nagasaki, Y. Kato, A. Fukuyama, T. Shimozuma, Y. Yoshimura, M. Nishiura, H. Takahashi, T. Tsujimura, N. Kenmochi, and R. Yanai
    • Organizer
      The 30th International Toki Conference on Plasma and Fusion Research
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] LHD低磁場放電における電子バーンシュタイン波放射計測2021

    • Author(s)
      伊神弘恵, 長崎百伸, 加藤悠, 福山淳 ,下妻隆 ,吉村泰夫, 西浦正樹, 高橋裕己, 辻村享, 釼持尚輝, 矢内亮馬
    • Organizer
      第38回 プラズマ・核融合学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of the Molybdenum Millimeter Wave Target Tile for ECRH Antenna Alignment after the Evacuation in LHD2020

    • Author(s)
      Hiroe Igami
    • Organizer
      The 29th International Toki Conference (ITC29)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 強磁場側からの基本Xモード入射による高密度プラズマの電子サイクロトロン共鳴加熱2020

    • Author(s)
      伊神弘恵、久保伸、下妻隆、吉村泰夫、西浦正樹、辻村亨、矢内亮馬、 釼持尚輝、田中謙治
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Excitation and propagation of waves in ion cyclotron harmonics and lower hybrid wave frequency range originated from high energy and low pitch angle ions in a magnetically confined fusion oriented device2019

    • Author(s)
      Hiroe Igami
    • Organizer
      9th East Asia School and Workshop on Laboratory, Space, and Astrophysical Plasmas
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] LHDにおける基本ECR層強磁場側からの異常波斜め直接入射による加熱2019

    • Author(s)
      伊神弘恵
    • Organizer
      第36回プラズマ・核融合学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Recent progress of the applications of ECRH/ECCD and the supportive technologies in the LHD2018

    • Author(s)
      Igami Hiroe、Kubo Shin、Shimozuma Takashi、Yoshimura Yasuo、Takahashi Hiromi, Ii Tsujimura Toru et al.
    • Organizer
      20th Joint Workshop on Electron Cyclotron Emission (ECE) and Electron Cyclotron Resonance Heating (ECRH)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of a Quick-Response Microwave Bolometer for the Stray Radiation Measurement in LHD2018

    • Author(s)
      Igami Hiroe、Kubo Shin、Shimozuma Takashi、Yoshimura Yasuo、Takahashi Hiromi、Tsujimura Toru Ii
    • Organizer
      2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of stair-like frequency transitions of ion cyclotron harmonic emissions in the lower hybrid frequency range in LHD2018

    • Author(s)
      Hiroe Igami, Mieko Toida, Kenji Saito, Tsuyoshi Akiyama, Ryosuke Seki, Shuji Kamio and LHD experiment group
    • Organizer
      The 27th International Toki Conference on Plasma and Fusion Research & the 13th Asia Pacific Plasma Theory Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中性粒子入射と電子サイクロトロン共鳴加熱による プラズマ立ち上げ時の低域混成共鳴周波数帯の波動計測2018

    • Author(s)
      伊神弘恵、樋田美栄子、齋藤健二, 秋山毅志, 神尾修治, 關良輔
    • Organizer
      プラズマ・核融合学会第35回年会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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